| Company | Timeline | Status | |
| The Transport Planning Society Ltd Director • Unreported | 19 Mar 2020←5 Years→Current | Active | |
| The Transport Planning Society Ltd Director • Transport Planner | 24 Feb 2010←9 Years→21 Mar 2019 | Active | |
| Transport Research Unit Limited Director • Transport Planner | 13 Jun 1995←25 Years→5 Jan 2021 | Dissolved | |
| Transport Research Unit Limited Secretary • Transport Planner | 13 Jun 1995←25 Years→5 Jan 2021 | Dissolved | |
| Metropolitan Transport Research Organisation Limited Secretary • Unreported | 28 Aug 1991←34 Years→Current | Active | |
| Metropolitan Transport Research Organisation Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
